ML320 (2003 model)

[curlyearly]

Have an intermittent engine problem with my fathers 2003 ML2003. The specialist mechanic says he search would beneift from a "Engine ECU Pin print out", think I remembered it right. Can anyone help or point me in the right direction.

For reference the fault is of intermittent nature and leads to lumpy running during tick over and medium revs. Never really rev it hard so can't comment about higher revs.

When attached to a computer the faults fluctuate between; Coils (these have been changed around and the fault always stay in the same place - in this case the off side bank). Also ignition and lambda sensors. Have had three lambda sensors.

All feedback gratefully received. Again, my the Engine ECU Pin Print Out if anyone can help.

Cheers all

 

[BlackC55]

There are wiring diagrams available on WIS.

Have the ignition leads been swapped?

Are the plugs ok?

Has a compression check been done?

What cylinder is missfiring?

 

[curlyearly]

Where is WIS? I searched for it on the net but found nothing viable. Do you have a link?

Plugs replaced, not cheap.
Colis swopped around, problem stays on O/S bank.
Compression not tested yet, in again next week and its on the list.
Currently running the car on Redex to clear system.

For reference, the vehicle is dual fuel (LPG). Never had any problems with LPG to date. Issue on both sides. Have had LPG system checked with an "all clear" from the installer.

In fairness the mechanic did suggest compression as a next point of call

 

[BlackC55]

What cylinder is missing?

 

[lynall]

Is compression a common fault on these? as i was under the impression 112 and 113 engines were almost indestructible.




Lynall

 

[AndyPCD]

Hi
What is the mileage on the vehicle. Does the vehicle lack power at all. This model do suffer with blocked cats so that is why when you swap pver the coils the fault still stays on the offside bank. when you swapped over the coils were they swapped left to right or just on the same bank